RNA world hypothesis

The RNA world hypothesis proposes that RNA was actually the first life-form on earth, later developing a cell membrane around it and becoming the first prokaryotic cell. This hypothesis is supported by the RNA's ability to store, transmit, and duplicate genetic information, just like DNA does. RNA can also act as a ribozyme (an enzyme made of ribonucleic acid). Because it can reproduce on its own, performing the tasks of both DNA and proteins (enzymes), RNA is believed to have once been capable of independent life.

Related Topics:
RNA - Cell membrane - Prokaryotic cell - Genetic - DNA - Ribozyme - Enzyme - Reproduce - Protein - Life

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The phrase "RNA World" was first used by Walter Gilbert in 1986. However, the theory of independent RNA life is much older and can be found in Carl Woese's book The Genetic Code (New York: Harper and Row, 1967).

Related Topics:
Walter Gilbert - Carl Woese

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